The Internet consists of loosely interconnected networks of computers located around the world. Computers communicate with each other by exchanging packets according to various protocols. Computers wishing to participate on the Internet need to follow the protocols used by other members of the Internet. The lowest level common protocol used on the Internet is named “Internet Protocol”, often refered to as IP [82]. The addressing mechanism used by IP is similar to phone numbers. All entities that communicate on the Internet must have an IP address